The Problem With Gravity
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The Trouble With Gravity
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Author : Richard Panek
language : en
Publisher: Houghton Mifflin
Release Date : 2019
The Trouble With Gravity written by Richard Panek and has been published by Houghton Mifflin this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with Science categories.
An award-winning science writer traces our millennia-long effort to understand the phenomenon of gravity--the greatest mystery in physics, and a force that has shaped our universe and our minds in ways we have never fully understood until now.
The Problem With Gravity
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Author : Michelle Mohrweis
language : en
Publisher: Holiday House
Release Date : 2023-09-26
The Problem With Gravity written by Michelle Mohrweis and has been published by Holiday House this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-09-26 with Juvenile Fiction categories.
A heartfelt selection for STEAM, LGBTQ+, and neurodivergent readers, this companion novel to The Trouble with Robots charmingly explores first crushes. Autistic seventh-grader Maggie Weir loves spacecraft, but aerospace engineering isn't the only thing that gives her butterflies: she’s teamed up with the amazing, baton-twirling Tatum Jones for an engineering contest! It’s an out of this world chance for Maggie to tell Tatum, her long time crush, how she feels. Only, Tatum is distracted with her own troubles at home. Worse still, when Maggie learns that her dad wants to move to Houston, her whole universe gets shaken up! Now she has a big decision to make: does she stay with her mom and remain in Tatum's orbit, or does she launch her dreams of visiting NASA by following her Dad? If the stars are meant to align between these two, they'll both have to admit their feelings before Maggie leaves forever. An easy-to-follow, dual perspective narrative that compassionately explores themes of separation, healthy friendship, and sibling rivalry. Another lovable cast of characters in the Barton Junior High universe!
The Pursuit Of Quantum Gravity
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Author : Cécile DeWitt-Morette
language : en
Publisher: Springer Science & Business Media
Release Date : 2011-02-15
The Pursuit Of Quantum Gravity written by Cécile DeWitt-Morette and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-02-15 with Science categories.
1946 is the year Bryce DeWitt entered Harvard graduate school. Quantum Gravity was his goal and remained his goal throughout his lifetime until the very end. The pursuit of Quantum Gravity requires a profound understanding of Quantum Physics and Gravitation Physics. As G. A. Vilkovisky commented , "Quantum Gravity is a combination of two words, and one should know both. Bryce understood this as nobody else, and this wisdom is completely unknown to many authors of the flux of papers that we see nowadays." Distingished physicist Cecile DeWitt-Morette skillfully blends her personal and scientific account with a wealth of her late husband's often unpublished writings on the subject matter. This volume, through the perspective of the leading researcher on quantum gravity of his generation, will provide an invaluable source of reference for anyone working in the field.
Classical And Quantum Gravity
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Author : Vincent R. Frignanni
language : en
Publisher:
Release Date : 2012
Classical And Quantum Gravity written by Vincent R. Frignanni and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Quantum gravity categories.
Classical and quantum gravity covers all aspects of gravitational physics and the theory of spacetime. This new book presents topical research in the study of classical and quantum gravity, including the weak field limit of fourth order gravity; the problem of time in quantum gravity; quantum correction and entropy spectrum in different gravity; quantum instability for charged particles on charged Nariai Black Holes and the equivalence of the generalised tetra formalism with the theory of general relativity.
100 Years Of Gravity And Accelerated Frames
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Author : Jong-Ping Hsu
language : en
Publisher: World Scientific
Release Date : 2005
100 Years Of Gravity And Accelerated Frames written by Jong-Ping Hsu and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Science categories.
This collection of papers presents ideas and problems arising over the past 100 years regarding classical and quantum gravity, gauge theories of gravity, and spacetime transformations of accelerated frames. Both Einstein''s theory of gravity and the YangOCoMills theory are gauge invariant. The invariance principles in physics have transcended both kinetic and dynamic properties and are at the very heart of our understanding of the physical world. In this spirit, this book attempts to survey the development of various formulations for gravitational and YangOCoMills fields and spacetime transformations of accelerated frames, and to reveal their associated problems and limitations. The aim is to present some of the leading ideas and problems discussed by physicists and mathematicians. We highlight three aspects: formulations of gravity as a YangOCoMills field, first discussed by Utiyama; problems of gravitational theory, discussed by Feynman, Dyson and others; spacetime properties and the physics of fields and particles in accelerated frames of reference. These unfulfilled aspects of Einstein and YangOCoMills'' profound thoughts present a great challenge to physicists and mathematicians in the 21st century."
When Gravity Breaks Down
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Author : Balungi Francis
language : en
Publisher:
Release Date : 2020-04-10
When Gravity Breaks Down written by Balungi Francis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-04-10 with categories.
In Newton's view, all objects exert a force that attracts other objects. That universal law of gravitation worked pretty well for predicting the motion of planets as well as objects on Earth and it's still used, for example, when making the calculations for a rocket launch. But Newton's view of gravity didn't work for some things, like Mercury's peculiar orbit around the sun. The orbits of planets shift over time, and Mercury's orbit shifted faster than Newton predicted.Einstein's idea was that gravity is not a force, but it is really an effect caused by the curvature of space and time. Although all its predictions have almost been confirmed by experiment, General relativity fails to explain details near space time singularities at the centre of Black holes and the mysterious dark matter. Which means Einstein equations cannot explain the motion of stars in galaxies and galaxy clusters. Mordehai Milgrom MOND explains the motion of stars in galaxies correctly without assuming Dark matter. Therefore MOND is an alternative to Newton's law of Universal gravitation. However the most serious problem facing Milgrom's law is that it cannot completely eliminate the need for dark matter in all astrophysical systems.Most theorists believe that gravitons must exist, and that they could be candidates for Dark matter, because quantum theory has successfully explained every other force of nature. But not everyone agrees. No theory claiming to unify quantum theory with GR has been successfully verified, and this has raised suspicions that perhaps gravity isn't like any other force - in which case gravitons may not exist.The theory of quantum gravity is expected to be able to provide a satisfactory description of the microstructure of space time at the so called Planck scales, at which all fundamental constants of the ingredient theories, c (speed of light), h ( Planck constant) and G ( Newton's constant), come together to form units of mass, length and time. The search for the full theory of quantum gravity has been stymied by the fact that gravity's quantum properties never seem to manifest in actual experience.One option for a solution to this conundrum is string theory, or the idea that everything we perceive as a particle or force is simply an excitation of a closed or open string, vibrating at specific but unique frequencies. One of the major criticisms of string theory has to do not with the theory so much as with theorists. Not only that, the strings of string theory are stupendously small, thought to be somewhere around the Planck scale, a bare 10-34 meters across. That's far, far smaller than anything we can possibly hope to probe even with our most precise instruments. The strings are so small, in fact, that they appear to us to be point-like particles, such as electrons and photons and neutrons. We simply can't ever stare at a string directly.Therefore emergent gravity or entropic gravity is a theory in modern physics that describes gravity as an entropic force, a force with macro-scale homogeneity but which is subject to quantum level disorder and not a fundamental interaction.The theory has been controversial within the physics community but has sparked research and experiments to test its validity. The problem is, if emergent gravity just reproduces General Relativity, there's no way to test the idea. What we need instead is a prediction from emergent gravity that deviates from General Relativity.Finally when all is said and done, the fifth force is proposed and its first result is that it reproduces the MOND and Emergent gravity results from one single force equation and solves all gravitational problems leaving none untouched. Although it is accurate there is one problem; it can't explain the origin of gravity.Gravity is then fixed by postulating that it is as a result of the Casimir effect due to vacuum polarizations with sounding experimental proof. This book will help you fix Gravity.
The Problem Of Time
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Author : Edward Anderson
language : en
Publisher: Springer
Release Date : 2017-09-18
The Problem Of Time written by Edward Anderson and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-09-18 with Science categories.
This book is a treatise on time and on background independence in physics. It first considers how time is conceived of in each accepted paradigm of physics: Newtonian, special relativity, quantum mechanics (QM) and general relativity (GR). Substantial differences are moreover uncovered between what is meant by time in QM and in GR. These differences jointly source the Problem of Time: Nine interlinked facets which arise upon attempting concurrent treatment of the QM and GR paradigms, as is required in particular for a background independent theory of quantum gravity. A sizeable proportion of current quantum gravity programs - e.g. geometrodynamical and loop quantum gravity approaches to quantum GR, quantum cosmology, supergravity and M-theory - are background independent in this sense. This book's foundational topic is thus furthermore of practical relevance in the ongoing development of quantum gravity programs. This book shows moreover that eight of the nine facets of the Problem of Time already occur upon entertaining background independence in classical (rather than quantum) physics. By this development, and interpreting shape theory as modelling background independence, this book further establishes background independence as a field of study. Background independent mechanics, as well as minisuperspace (spatially homogeneous) models of GR and perturbations thereabout are used to illustrate these points. As hitherto formulated, the different facets of the Problem of Time greatly interfere with each others' attempted resolutions. This book explains how, none the less, a local resolution of the Problem of Time can be arrived at after various reconceptualizations of the facets and reformulations of their mathematical implementation. Self-contained appendices on mathematical methods for basic and foundational quantum gravity are included. Finally, this book outlines how supergravity is refreshingly different from GR as a realization of background independence, and what background independence entails at the topological level and beyond.
The Problem Of Gravity Measurement At Sea With Gravimeters
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Author : Anton Graf
language : en
Publisher:
Release Date : 1956
The Problem Of Gravity Measurement At Sea With Gravimeters written by Anton Graf and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1956 with Gravimeters (Geophysical instruments) categories.
Quantum Gravity
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Author : Carlo Rovelli
language : en
Publisher: Cambridge University Press
Release Date : 2007-11-29
Quantum Gravity written by Carlo Rovelli and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-11-29 with Science categories.
Quantum gravity is perhaps the most important open problem in fundamental physics. It is the problem of merging quantum mechanics and general relativity, the two great conceptual revolutions in the physics of the twentieth century. The loop and spinfoam approach, presented in this 2004 book, is one of the leading research programs in the field. The first part of the book discusses the reformulation of the basis of classical and quantum Hamiltonian physics required by general relativity. The second part covers the basic technical research directions. Appendices include a detailed history of the subject of quantum gravity, hard-to-find mathematical material, and a discussion of some philosophical issues raised by the subject. This fascinating text is ideal for graduate students entering the field, as well as researchers already working in quantum gravity. It will also appeal to philosophers and other scholars interested in the nature of space and time.
Experimental Search For Quantum Gravity
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Author : Sabine Hossenfelder
language : en
Publisher: Springer
Release Date : 2017-11-15
Experimental Search For Quantum Gravity written by Sabine Hossenfelder and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-11-15 with Science categories.
This book summarizes recent developments in the research area of quantum gravity phenomenology. A series of short and nontechnical essays lays out the prospects of various experimental possibilities and their current status. Finding observational evidence for the quantization of space-time was long thought impossible. In the last decade however, new experimental design and technological advances have changed the research landscape and opened new perspectives on quantum gravity. Formerly dominated by purely theoretical constructions, quantum gravity now has a lively phenomenology to offer. From high precision measurements using macroscopic quantum oscillators to new analysis methods of the cosmic microwave background, no stone is being left unturned in the experimental search for quantum gravity. This book sheds new light on the connection of astroparticle physics with the quantum gravity problem. Gravitational waves and their detection are covered. It illustrates findings from the interconnection between general relativity, black holes and Planck stars. Finally, the return on investment in quantum-gravitation research is illuminated. The book is intended for graduate students and researchers entering the field.